Mouthpiece



FIG. 1 is a top, front perspective view of the mouthpiece showing my new design;

FIG. 2 is a bottom, front perspective view thereof;

FIG. 3 is a front and back elevational view thereof, with the back elevational view being a mirror image thereof;

FIG. 4 is a right-side elevational view thereof, with the left-side elevational view being a mirror image thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a sectional view thereof, taken along line 7-7 of FIG. 2;

FIG. 8 is an in-use right-side perspective view of the mouthpiece in FIG. 1 inserted into an open mouth with a breathing tube extending from the bottom; and,

FIG. 9 is an in-use right-side perspective view of the mouthpiece in FIG. 1 inserted in a closed mouth with a breathing tube extending from the bottom.

The broken line showing of the mouth and the tube in FIGS. 8 and 9 depicts environmental subject matter that forms no part of the claimed design. All other broken lines in the drawings depict portions of the mouthpiece that form no part of the claimed design. 

CLAIM The ornamental design for a mouthpiece, as shown and described. 